diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 426c55b45e79..d5706b8b68a1 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -350,6 +350,7 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		goto add_sync_ep_from_ifnum;
 	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
 	case USB_ID(0x31e9, 0x0002): /* Solid State Logic SSL2+ */
+	case USB_ID(0x0d9a, 0x00df): /* RTX6001 */
 		ep = 0x81;
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;